Magnifier



FIG. 1 is a side view of the magnifier, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a top view thereof in a half open position; and,

FIG. 4 is a top view thereof in a fully open position.

The broken lines form no part of the claimed design. 

The ornamental design for a magnifier, as shown and described. 